Compound fuel



Patented Dec. 4, 1928.

UNITED STATES PATENT OFFICE.

PIERRE HENRI LEVEQUE. OF PARIS. FRANCE. ASSIGNOR TO SOCIE'IE DE BECHERCHES ET DE PERFECTIONNEMENTS INDUSTRIELS, OF PUTEAUX, SEINE, FRANCE, A.

FRENCH COMIANY.

COMPOUND FUEL.

No Drawing. Application filed October 4, 1927, Serial No. 223,997, and in Germany October 11,- 1926. Renewed October 12, 1928.

It is known that the Trent coal purifying process consists in crushing the coal bearing material in water and in mixing intimately the pulp thus obtained with the quantity of oil re uired for agglomerating the oil-coated ing the greater proportion of the impurities.

The purified product obtained is a mixture of coal and oil.

The French Patent No. 534,170. in the name of the Trent processcorporation and the U. S. Patent No. 1,420,165 to Trent describe the means for forming an agglomerated fuel with this product after pressing it into bricks or the like and then submitting it to distillation generally at about 500 C. The residuum of this distillation is constituted chiefly by carbon. It has the property of burning without smoking whereby it may be used to replace anthracite for home heating. Its drawback however lies in the fact that it is too light due to the fact that too man volatile components had driven o in distillation.

Now the object of my invention is to overcome this drawback and to produce with the same original product a. heavier fuel having properties nearer related to those of anthracite. It consists in increasing the density of the product obtained by incorporating in the mixture of purified coal and oil obtained by the Trent or a similar process a certain amount of anthracite or of another close burning coal before the whole is pressed and distilled. This incorporation is made possible by the amount of oil required for the purification of the coal according to the,

Trent process. This amount varies from 15 to 25% of the Whole amount according to the kind of oil used (fuel oil, tar oil or the like). Such an amount of oil is suflicient to allow, without addition of any further binding medium, the incorporation into the product of an amount of anthracite or the like which-is variable according to the fineness of this anthracite or similar coal and which may insome cases reach 2 to 3 times thedweight of the agglomerated coal'and oil use By reason of this incorporation, the distillation causes a proportionately much smaller amount of volatile components to be driven out. This is caused by the fact that the incorporation of anthracite does not require any further binding medium which binding medium would counterbalance or reduce to a great extent, through itsintroducing further volatile components, the

advantage which I have endeavoured to gain.

to m invention has a reater s ecific wei ht and 1s much more similar to anthracite than the usual fuel formed without addition of anthracite or the like from the agglomerated coal and oil obtained through the Trent process.

What I claim is:

1. A process for forming a compound fuel consisting inoil purifying coal, incorporating pulverized close burning coal to the mixture of oil and coal obtained, pressing and finally distilling the product.

2. A. process for forming a compound fuel consisting in oil purifying coal, incorporating twice its amount of anthracitev to the so mixture of oil and coal obtained, pressing. and finally distilling the product.

In testimony whereof I have affixed my signature.

PIERRE HENRI LfivEoUE. 

